My bluetooth keyboard and majic trackpad will only work when they are charging
I've had my bluetooth accessories for probably two years. They have been working, both with and without the charging cord. Today, they would only work when the charging cord was plugged in. Is there a way to replace the batteries in them? Or otherwise repair them? I know that Apple support will replace them for $29 each. But how to diagnose?
MacBook Pro, Mac OS X (10.7.2)